PKR activation enhances replication of classical swine fever virus in PK-15 cells.
PKR activation enhances replication of classical swine fever virus in PK-15 cells.
复制标题
PKR 激活增强猪瘟病毒在 PK-15 细胞中的复制
DOI:
10.1016/j.virusres.2015.04.012
复制
发表时间:
2015-06-02
期刊:
影响因子:
5
通讯作者:
Chen JD
中科院分区:
文献类型:
--
作者:
Liu WJ;Yang YT;Zhao MQ;Dong XY;Gou HC;Pei JJ;Chen JD
CSFV infection triggers PKR and eIF2α protein phosphorylation. PKR overexpression stimulates viral replication. PKR depletion blocks eIF2α phosphorylation and suppresses viral replication. PKR depletion increases IFN-β, and enhances the antiviral effect of IFN. Classical swine fever (CSF) is a highly contagious swine disease that is responsible for economic losses worldwide. Protein kinase R (PK)R is an important protein in the host viral response; however, the role of PKR in CSFV infection remains unknown. This issue was addressed in the present study using the PK-15 swine kidney cell line. We found that CSFV infection increased the phosphorylation of eukaryotic translation initiation factor (eIF)2α and its kinase PKR. However, the expression of viral proteins continued to increase. Furthermore, PKR overexpression enhanced CSFV replication, while PKR inhibition resulted in reduced CSFV replication and an increase in interferon (IFN) induction. In addition, PKR was responsible for eIF2α phosphorylation in CSFV-infected cells. These results suggest that the activation of PKR during CSFV infection is beneficial to the virus. The virus is able to commandeer the host cell's translation machinery for viral protein synthesis while evading innate immune defenses.
登录
查看更多内容
影响因子:
6.7
作者:
Arnaud N;Dabo S;Akazawa D;Fukasawa M;Shinkai-Ouchi F;Hugon J;Wakita T;Meurs EF
通讯作者:
Meurs EF
影响因子:
7.3
作者:
Kang R;Tang D
通讯作者:
Tang D
影响因子:
30.3
作者:
Garaigorta U;Chisari FV
通讯作者:
Chisari FV
影响因子:
3.7
作者:
Elbahesh H;Scherbik SV;Brinton MA
通讯作者:
Brinton MA
影响因子:
29.4
作者:
Kang W;Sung PS;Park SH;Yoon S;Chang DY;Kim S;Han KH;Kim JK;Rehermann B;Chwae YJ;Shin EC
通讯作者:
Shin EC